Results 11 to 20 of about 534 (178)
Mesocyclone-Targeted Doppler Velocity Dealiasing
Journal of Atmospheric and Oceanic Technology, 2017 AbstractThe alias-robust variational (AR-Var) analysis developed originally for dealiasing raw velocities scanned from winter ice storms by operational WSR-88D radars was recently extended for dealiasing raw velocities scanned from all storms to increase the dealiased data coverage.
Qin Xu, Kang Nai
openaire +2 more sources
Using a composition of convective instability indices to predict the occurrence of polar mesocyclones in the Arctic region of Russia [PDF]
Российская Арктика, 2023 The article presents a brief description of the developed technological line for the automatic prediction of the occurrence of polar mesocyclones in the Arctic region of Russia.
Petrichenko S.A. +3 more
doaj +2 more sources
Low-Level Polarimetric Radar Signatures in EnKF Analyses and Forecasts of the May 8, 2003 Oklahoma City Tornadic Supercell: Impact of Multimoment Microphysics and Comparisons with Observation [PDF]
Advances in Meteorology, 2013 The impact of increasing the number of predicted moments in a multimoment bulk microphysics scheme is investigated using ensemble Kalman filter analyses and forecasts of the May 8, 2003 Oklahoma City tornadic supercell storm and the analyses are ...
Daniel T. Dawson II +4 more
doaj +2 more sources
Supercell Low-Level Mesocyclones: Origins of Inflow and Vorticity [PDF]
Monthly Weather Review, 2023 Abstract The development and intensification of low-level mesocyclones in supercell thunderstorms have often been attributed, at least in part, to augmented streamwise vorticity generated baroclinically in the forward flank of supercells. However, the ambient streamwise vorticity of the environment (often quantified via storm-relative helicity ...
Brice E. Coffer +3 more
openaire +3 more sources
Mesocyclone Passes over NSSL Surface Station
Bulletin of the American Meteorological Society, 1982 An apparent mesocyclone passed directly over a surface station that was equipped with both digital and strip chart recorders near Criner, Okla. Peak gusts were 18 m s−1 (35 kt); within 3 min the surface wind changed from strong southeasterly to strong westerly. The pressure dropped 5 mb in 52 min and recovered 4 mb in 6 min.
Edwin Kessler
openaire +2 more sources
In fluence parameters for a polar mesocyclone development
Meteorologische Zeitschrift, 2005 Polar mesocyclones are small-scale, short-living phenomena in the Arctic and Antarctic. Their forecast is difficult due to a lack of knowledge of initial and boundary conditions. Idealised sensitivity studies are performed with the mesoscale atmosphere -
Silke Dierer +1 more
doaj +2 more sources
Geophysical Research Letters, 2023 Results from a large eddy simulation of a tornadic supercell developing in a horizontally homogeneous environment are presented which clearly illustrate a connection between low‐level mesoyclone development and the development of a streamwise vorticity ...
Catherine A. Finley +3 more
doaj +2 more sources
, 2023 <p>A defining feature of supercells is the <em>mesocyclone</em>, which has been implicated in facilitating updraft maintenance and strength, as well as tornado and hail production. But what, exactly, is a mesocyclone?</p> <p>Popular textbooks define the mesocyclone as a & ...
Matthew Kumjian +3 more
openaire +2 more sources
Earth and Space ScienceOn the afternoon of 5 July 2024, under the influence of an extratropical cyclone, a rare triple‐tornado event struck Heze City, Shandong Province, comprising the Dongming tornado (EF3), the Juancheng tornado (EF2), and the Yuncheng tornado (EF3).
Jiwen Zhang +6 more
doaj +2 more sources
A case study of South Australia’s severe thunderstorm and tornado outbreak 28 September 2016 [PDF]
Journal of Southern Hemisphere Earth Systems Science, 2023 An analysis of the South Australian severe thunderstorm and tornado outbreak of 28 September 2016, which produced at least seven tornadoes and contributed to a state-wide power outage, is presented here. Although challenging, prediction and understanding
Jeffrey D. Kepert +2 more
doaj +1 more source